Improvement in car-brakes



it nai-Tfr W. o R I sw o to, `o F N n W Y o n le@ "atri/ni @ittica wIMPROVEMENT 1N CAR-BRAKES..

f 13mm-g paient N .-106,152, dated August 9, 1870- The Schedulereferredltoiu these Lettere Patent and making of the same I, MERRITT W.lG nrswoen, of the city, county,

. `and'State of-'Ncw York, have invented a new and im`` ling is a`specieation; 1 y Y My invention relates` to the suspension of a pivotcdproved Brake for RailroadOal-s, of which thefbllowoscillating or'rocking har or fraaie from the truck of `a railroad car, Vin `iront ot'or between the wheels thereof, in-sueh nianneras that one end oftlie'banoiframe may bezldropped down upon the track, audio t fthecombination oi'fsueh a bar orfanie with theol- V14 dinary wheel-brakes,by means oi.' suitable links or joints, in such manner as `that .thefriction 'of' said i brakes, when appliecbsball automatically operateupon x. the oscillating .bar or frame, and f'oree oneendthereoidoivnaipon the'rrail jwith apower.proportionateto that withwhich thewheel is carried forwardandthe brake `brought to bear thereon,the object of my invention being to combine, with the resistance `oftheordinary" brakes applied to the-wheels vof a car, the resistance if abrak-e applied to the rail, and to operate them both bytheordinaryderiees and mechanical appliancesnowinuse t Intheaccompanyingdrawingfi ligure l is a sidey view oi' af car-truck to whichmy improved voscillating bar and brake is attached, illustratug therailaml'wheelllnakes applied and in operation. y i i,

Figure 2 is a longitudinal section taken through the 7 truekinside 0fthe wheels-and ylooking outward, illustrating, in elevation, the innerside of thebar and its attachments and supports, the wheel-brakes beingshown, however, `as at `rest,withdrawn from contact `with the wheel'sandrail.` t y Figure 3 illdstrates, in elevation, a modified 4form of: myrail-brake,.consisting oi' an' oscillating fraaie `workingagainsttheral, instead of asixnple barthc 'wheel-brakesbeing supportedby -slides working upon the upper bar of `the frame.

" Figure 4 `is an end, view of ,the oscillating bar andl of the improvedshoe secured thereto to bear upon the rail, illustrating the grooves cutin one side off ,said shoe, to facilitate the. breaking oiiV oitl1e`edgeslas the .Ads the car-truck,y of any approved cnstruction.B,-its'wheels. y v 1 i (J,v the brake-bars of the truck, extendingacross the same transversely, and made. to slide to and from the wheels,in the`usual manner, byineans of a lever and cl1aius,workedby abrake-wheel and post on the plat.- i'ormof the car,y or by othercustomary and wellknown devices for the purpose. I

The brake-bars;however, instead of sliding `upon horizontal ways toand`from the wheels, are supported by such horizontal wayslonly `when drawnentirely back from the wheels.. *When thrown out to come intoContacttherewith, they are upheld. by the. action ot' supportingsprings, in combination with the oscillating baror frame, as hereinaftermore fully explained.

D D are the brake-blocks,- bearing against the peripheries of the,wheels B B, and operated by the aetonof the brake-bars .0, in the usualmanner.

A lfhnsyfaritbe brakes and appliances, as described,

and the mode ofoperating thesame, are old and wellknown devices, such asare ,in common use upon the railways ofthe country. i F is myoscillating-or'roeking rail-brake.

-It consists of a bar, F, pivoted centrally at S, be-

tween a hanger-bar, H, (extending on the outer` sideA of the track andwheels from oneaxle to `the other,

and seeuredtbereto by the same bolts and nuts used to fasten theordinary horizontal braeeA', which extends between the same, as shownii1fig.1,)and a lhanger-frame, I, secured' ou the inner side of thewheels tothe bottom of'the lower transverse truckbeam J, and made toclamp 0r embrace the sides thereof', as shown in iig. 2ot` the drawing.

`E 'E are the links, pivoted to .,tllebar Fat eit-h'er end thereof, andwhose upper ends are secured to the ends of the brake-bars O,.bet\veensaid bars yand thebrake-blocks D, these brake-blocks being` hinged tosaid links instead of being Yjointed directly tosaid bars, as isordinarily the ease.

G G are detachable shoes or blocks, iir'mly secured nponthe under sidesof the ends of the bar F, so as i to receive the wear and tearincidental to the application' of the brake to the rail, as hereinaftermorel fully set forth. y y l '.lhese brake-shoes G are groovedlongitudinally upon one side, (see fiff. 4,) so that, as they are worndown `(mnt-rally by contact with the head of then'ail, `the lip -oriange consequently formed upon that side ot' the bottom of the shoe willbreak off as soonas the shoe is worn down to one of the said grooves,andthe liability to accidents, which would follow were the lips orflanges formed on 'each side allowed' both .to remain so asto yembracethe rail, thus be avoided.

In iig. 2,'i t" are horizontal projections from theupper side of `thehanger-frame 1, npon'which the brakebars G 0 rest when drawn back torelieve the brakes' I). Y v

(e care rods or pins, secured to the under side of said bars U G, tobear upon the ends ot' springs K', se-

cured to the under side of thelower truck-beam J,'s`o as to projecttherefrom, asshown in iig. 2 ofthe drawing. t

lhese springs serve to` uphold the ba 's O C, after they. have beenthrown out {remt-he rests it', in a horizontal plane therewith. It isevident that `various forms ot' springs may be thus applied vfor thepurpose of supporting the brake-bars.. f

In operating the improved brakes, constructed as above described, whenthel brake-blocks D are thrown ont and forced against the wheels B,turning in the directionindicated by the arrows in iig. 1, they firststrike against the saine, each iu the horizontal plane in which they areupheld by the action of the springs K K, supporting their transverseconnecting-bars C (l, (see iig. 2,) but so soon as they come into `closecontact with the revolving wheels, the brake-blocks bearing against thefront wheels are drawn upward, earrying up with them the correspondingarm ofthe pivoted bar, to which they are connected by the links E, whilethe brakes against the hind wheels are sinnlitancously forced downward,bearing down with them, to a corresponding extent, the opposite arm ofthe pivotcd bar F and the end of the-spring K, upon which the brakelbarC rests.

By the movement of the piroted bar F, thus pro.- dueed, thc. rear endthereof is brought to bear down upon the rail l with a degree ofpressure proportionate to that of the brake-blocks upon the wheels andthe velocity oi' their rotation. 1

So soon as the brake-blocks are withdrawn.from the wheels, theresistallce of the spring under the depressed rear brake-bar, combinedwith the weight of the elevated front brakc-bar, will operate toA bringthese bars and the brakes to their original horizontal position, whenthey may be dra-wu back upon their rests ,t i, iig. 2, and thus securedagainst accidental.

vContact with the wheels.

L L', Vtig. 3, represent lny invention when constructed in the form of aframe. The lower bar, L, of theframe corresponds, in all essentialparticulars, with Y the bar G, above described, and is pivotedcentrally,

in like manner, to 'a hanger, N, suspended from the trnck-bean1 or itsframe-work.

At each end of this lower bar "L are two uprigh'ts, connected by anupper horizontal bar, L', so as to form the fra|ne,as illustrated infig. 3.

M M are boxes or siides embracing the ,upper bar L of the frame, andmade to slide smoothly back and forth thereon.

The ends of thetransverse bars C of the truck are secured to the rearends of these slides, and to their forward ends are jointed the ordinarybrake-blocks I). rJthe horizontal position of the bar L', when at rest,may be enforced by springs, placed under or otherwisc combined with thebrake-bars C C, as before described.

The operation of the brakes, when applied tothe wheels, will serve tocause the frame to tip, so as to bring the rear end of its lower bar, L,to bear against the rail, substantially as described, with reference tothe rail-brake G.

I contemplate, as a modification of my invention, employing a bar, G,pivoted at one end only, and connected with a single brake-bar,operating alone, as may be illustrated by considering the operation ofthe rear halt' of the bar G, in ti'wl, if parted beyond its pivot fromthe remainder thereof, and connected to and operated by the rearbrake-block alone.

I claim as my inveution- ,1. A pivoted oscillating or rocking bar orframe, so supported from the truck of a railroad car and combined withits wheel-brakes, as that the friction of the latter upon the wheelsshall operate to depress 'and force down upon the rail one end of saidbar or frame, substantially in the manner and for the purpose herein setforth.

2.2. Lateral grooves formed in the sides of a railbrake-bar or shoe, G,substantially as and for the pur pose herein set forth.

Witness my hand to the foregoing specification this 22d day of January,A, I). 1870.

" MERRITT W. GRISWOLD.

Witnesses:

DAVID A. BURR, H. H. YOUNG.

